.content {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    width: 283px;
    height: 283px;
    border-left: 2px solid #000;
    border-top: 2px solid #000;
    border-radius: 2px;
}

.btn-number {
    width: 96px;
    height: 96px;
    margin-top: 30px;
    border-left: 2px solid #000;
    border-top: 2px solid #000;
    border-radius: 2px;
}

.mid-box {
    display: flex;
    flex-wrap: wrap;
    width: 93px;
    height: 93px;
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
    /* border: ; */
}
.box {
    width: 30px;
    height: 30px;
    line-height: 30px;
    border-right: 1px solid #000;
    border-bottom: 1px solid #000;
}
.box:hover{
    background-color: #ccc;
}

.active {
    background-color: #999 !important;
}

.btn-box {
    display: flex;
    justify-content: space-around;
    margin-top: 30px;

}